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Finding the Fourth Proportional to 916.02, 1,375.20 and 886.86

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Solution

The fourth proportional to 916.02, 1,375.20 and 886.86 is: 1,331.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.02 : 1,375.20 = 886.86 : x
  2. Step 2: Convert to fraction form
    916.02/1,375.20 = 886.86/x
  3. Step 3: Cross multiply
    916.02x = 1,375.20 × 886.86
  4. Step 4: Simplify right side
    916.02x = 1,219,609.87
  5. Step 5: Solve for x
    x = 1,219,609.87/916.02
  6. Step 6: Final answer
    x = 1,331.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.